...se his own line of retreat, too; and with such good judgment as to be within reach of any new combination of Bragg — from whom he was now cut off-or, failing that, to keep his rear open through Virginia , to Lee's army. Meantime, Grant massed troops in Chattanooga, sufficient in his judgment to crush Bragg; and, learning of the latter's detachment of Longstreet's corps, determined to strike earl...